Laminated spring.



H. FROOD. LAMINATED SPRING. APPLICATION FILED AUG-8. 1917.

1 $5fi9 D Patented Jan. 22, 1918.

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HERBERT FROUD, 0F CHAPEL EN-LE-FJRITH, ENGLAND.

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Application filed August 8,

To all whom it may concern:

Be it known that I, HERBERT Fnoon, a subject of the King of GreatBritain and Ireland, and a resident of Chapel-en-le-Frith,

'in the county of Derby, England, have ininsure smooth working. Theobject ofthe invention is to provide improved and simple means forretaining the interleaving in position between the leaves of the springand preventing it from working out laterally.

According to this invention, I provide the interleaving with beaded orother enlarged edges which lie immediately outside of the edges of theleaves of the spring.

In the accompanying drawing, Figure 1 is an elevation of a laminatedspring to which is applied a woven interleaving in ac- Y cordance withthe invention, Fig. 2 a crossformed in any suitable way. For example, Imay inclose wlre, string, thin cord or other section thereof, and Fig. 3a part perspective view of the interleaving. Figs. 4 to 10 inclusive arepart perspective views of modified forms of beaded-edged interleavingaccording to the invention.

Referring to the drawing, a, Figs. 1 and 2, is the interleaving arrangedbetween the leaves 6 of the spring and provided with beaded or enlargeded es 0 which lie immediately outside the sldes of the leaves.

The beaded or enlarged edges 0 may be suitable material 01 along theedges of the interleaving a either during the weaving of the latter, asin Fig. 3, or by. turning the edges a of the interleaving over thewires,- cords or the like d and securing them by sewing, as in Fig. 4:.Or I may make the interleaving sufficiently wide and fold or turn overthe edges a thereof one or more times and secure the folded or turnedover edges by sewing, as in Fig. 5, or otherwise suitably. Or, as shownin Fig. 6, the inter- Specification of Letters Patent.

Patented Jan, %2, rate.

191?. $erial No. l85,17'?.

leaving a may be woven with pockets e along its edges for the subsequentreception of wires, strings or other thickening means. Or I may sewalong the edges a of the interleaving folded or doubled separate piecesof similar or other suitable fabric, or flat or round cord, braid or thelike a as i Fig. "i'.

The beaded or enlarged edges may be applied to interleaving composed ofthin plates or strips of metal or other suitable material. In suchcases, the beaded or enlarged edges 0 may be integral with theinterleaving a, as shown in Fig. 8, or be formed by narrow strips a ofmetal or other suitable material attached to the interleaving by rivetsf, as in Fig. 9, or in other suitable fashion.

The beaded or enlarged edges 0 are preferably continuous though, ifdesired, they may be interrupted at intervals, as illus trated in Fig.10.

It will be seen that whenthe interleaving a is arranged between theleaves I) of the spring, the beaded o'r enlarged edges a lyingimmediately outside the edges of the leaves, prevent lateraldisplacement of the interleaving and retain it in position.v Further,the beaded or enlarged edges give a neat appearance to the spring.

What I claim as mv invention, and desire to secure by Letters Patentis 1. An interleaving for laminated springs provided at its edges withenlargements.

2. In a laminated spring, strips of interleaving arranged between-theleaves of the spring and provided with enlargements at their edges,which enlargements lie outside of the leaves and prevent lateraldisplace which enlargements lie outside of the leaves and preventlateral displacement of the strips of interleaving.

In witness whereof I have hereunto set my hand.

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